Justification:Coryphantha maiz-tablasensis is known only from five locations, some of which are potentially threatened by cultivation. Large portions of the range have already been lost. The extent of occurrence is 4,000 km², there is continuous decline due to loss of habitat. The location near Matehuala was nearly destroyed by road construction, and only a few plants are left, which are likely to be removed by collectors. The species is therefore listed as Endangered under criterion B1ab(ii,iii,v).

This species is endemic to the state of San Luis Potosí, Mexico. It is found in the Río Verde, Villa Juárez and Cd. del Maíz Municipalities. The plants at all locations are scattered and form large groups. There are two locations south of Huizache on highway 57. According to Fitz-Maurice this species should not be listed as Endangered given that there is evidence that it is widely scattered.

The main site is in the dry lagoon of Las Tablas in gypsum soil with grass. The habitat is locally classified as follows: eastern subpopulation - Zacatal (Grassland); central subpopulation - Matorral Desértico Micrófilo with Yuccas (Rzedowski 1978).

This cactus is listed on CITES Appendix II. It is not known to occur in any protected area. This species is legally protected in Mexico by the national list of species at risk of extinction, NOM-059-SEMARNAT-2010, where it is listed under category “threatened” (A; SEMARNAT 2010).